Python-сообщество

import os, Image, math
list_files_jpg = [file_name for file_name in os.listdir('.') if file_name.endswith(".jpg")]
for i in list_files_jpg:
    im=Image.open(i)
    factor=im.size[0]/460.0
    f=int(math.ceil(im.size[1]/factor))
    out=im.resize((460,f))
    newname=i.split(".")[0]+"_r.jpg"
    out.save(newname)

import os, Image, math

import os
import Image
new_width=460
list_files_jpg = [file_name for file_name in os.listdir('.') if file_name.endswith(".jpg")]
for i in list_files_jpg:
    im=Image.open(i)
    scalefactor=im.size[0]/float(new_width)
    newsize=(new_width, int(im.size[1]/scalefactor)+1)
    out=im.resize(newsize, Image.ANTIALIAS)
    out.save('r_'+i)

import os
import Image
def new_image(path, new_width, text="r_"):
    for name in [file_name for file_name in os.listdir(path) if file_name.endswith(".jpg")]:
        img = Image.open(name)
        out = im.resize((new_width, img.size[1] * new_width / img.size[1] + 1), Image.ANTIALIAS)
        out.save(text + name)
new_image("Ваш_путь", 460)

out = im.resize((new_width, img.size[1] * new_width / img.size[1] + 1), Image.ANTIALIAS)

out = im.resize((new_width, img.size[1] * new_width / img.size[0] + 1), Image.ANTIALIAS)